package com.example.demo.collection.concurrenthashmap;

import java.util.concurrent.ConcurrentHashMap;

/**
 * ConcurrentHashMap
 *
 * @author Roger
 * @since 2021/6/21
 */
public class ConcurrentHashMapTest {

    public static void main(String[] args) {
        ConcurrentHashMap map = new ConcurrentHashMap();
        map.put("aa","bbb");
        map.get("aa");
        map.size();
    }

}
